Extech Instruments 421502 Скачать руководство пользователя страница 5

5

                                     

421502-en-GB_V2.0    3/19

 

SET Mode  

Manually Setting the Relative (REL) Reference Value 

Note: Refer to the Relative Mode section for setting the temperature reference value 
automatically, using the currently displayed temperature as the reference value. 
 
To set the reference manually and to then use the Relative Mode, press the "SET" button; 
the display will show dashes 

“ 

- - - -

.  Enter a reference temperature using the numeric 

buttons. You must use leading zeros; for example, enter 0050.0 to for a 50.0

o

 reference 

temperature. Once the reference value is entered, press the 

ENTER

 button four times.  

 
To display the difference between the actual temperature and a manually entered 
Relative value, press the REL key and then the SET key. The meter will now display actual 
temperature minus the reference temperature

. Press the “REL” 

button to exit the mode. 

Setting the Real Time Clock/Elapsed Timer 

Press the "SET" button and then the "ENTER" button. Set the Hours, Minutes, and 
Seconds (HH:MM:SS) using the numeric buttons. When editing is complete, the clock will 
start to run. Press the "ENTER" button three times to exit. Use the 

SEC/MIN

 button to 

switch between Hours/Minutes (Min) and Minutes/Seconds (Sec) display modes. 

Setting the Alarm High/Low Limits 

Press the "SET" button and then press the "ENTER" button twice. Set the desired High 
Alarm limit using the numeric buttons. You must enter the value using all 5 digits, 
including leading zeros. Example: 25.0

o

C is entered as 0025.0. 

 
Press the "ENTER" button once.  Set the Low Alarm limit using the numeric buttons. You 
must enter the value using all 5 digits, including leading zeros. Example: 5.0

o

C is entered 

as 0005.0. Press 

ENTER

 to exit. 

 
To activate the high/low alarms, press the "HI/LO Limits" button, the meter will beep, and 
the audio icon will appear. The meter will produce a continuous tone when a high or low 
alarm limit is reached. 

Press the “HI/LO Limits” button to silence the alarm (see Alarm 

Operation section below for more information). 

Содержание 421502

Страница 1: ...User Manual Dual Input Type J K Digital Thermometer Model 421502 Additional User Manual Translations available at www extech com ...

Страница 2: ...ion printed on buttons and secondary function printed above buttons numerical keypad and ENTER button Note The battery compartment not pictured is located on back of meter The meter s protective jacket must be removed to gain access to the compartment Operation Meter Power Ensure that a fresh 9V battery is installed rear compartment before powering the meter Press the power button upper left butto...

Страница 3: ...ect the mode for the meter s secondary display lower smaller digits Choose T1 or T2 to select thermocouple input 1 or 2 for display Select T1 T2 to display the difference between the two thermocouple measurements In T1 T2 mode a reading of zero indicates that both thermocouples are reading the same temperature Set the Thermocouple type Choose Type K or Type J thermocouple using the K J buttons The...

Страница 4: ... MAX button to exit and return to normal operation Relative REL Mode Primary Display Relative mode allows the user to store a reference temperature for comparison with subsequent measurements The reference temperature can be automatically or manually set for manual entry see the SET mode section For automatic entry the displayed temperature is used as the reference value Perform the steps below 1 ...

Страница 5: ...Press the SET button and then the ENTER button Set the Hours Minutes and Seconds HH MM SS using the numeric buttons When editing is complete the clock will start to run Press the ENTER button three times to exit Use the SEC MIN button to switch between Hours Minutes Min and Minutes Seconds Sec display modes Setting the Alarm High Low Limits Press the SET button and then press the ENTER button twic...

Страница 6: ...rgeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and elect...

Страница 7: ... rdg 0 6o F 58o F 2498o F 0 05 rdg 1 4o F 58o F 328o F Temperature Coefficient 0 1 times the applicable accuracy specifications per o C from 0o C 18o C and 28o C 50o C 32o F 64o F and 82o F 122o F Water resistant housing Gasket protected front panel Input Protection 24VDC or 24VAC rms max input on any combination of inputs Measurement rate One reading per second Input connectors Accepts standard m...

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